This will show you how to export your RSS feeds from Outlook 2013 to any other program/service by OPML file.
Step 1
Click FILE tab
Step 2
Click Open & Export option
Step 3
Click Import/Export button
Step 4
Select Export RSS Feeds to an OPML file option. Click Next.
Step 5
Select which feeds you want to export, then choose file name and path.
Troubleshooting
If you get similar error:
You do not have permission to save to this location.
Choose another location to save this file.You are probably trying to save file in root folder like c:file.opml. Choose any other folder to export the file, like c:tempfile.opml